CVE-2017-12240: Cisco IOS and IOS XE Software DHCP Remote Code Execution Vulnerability
The Dynamic Host Configuration Protocol (DHCP) relay subsystem of Cisco IOS and Cisco IOS XE Software contains a vulnerability that could allow an unauthenticated, remote attacker to execute arbitrary code and gain full control of an affected system.
| Vendor | Cisco |
|---|---|
| Product | IOS and IOS XE Software |
| Date added to KEV | 2022-03-03 |
| Due date (BOD 22-01) | 2022-03-24 |
| Known ransomware campaign use | Unknown |
| CWE | CWE-20 |
| Required action | Apply updates per vendor instructions. |
What to do
- Identify every instance of Cisco IOS and IOS XE Software in your environment (asset inventory, EDR, vulnerability scanner).
- Apply CISA's required action: Apply updates per vendor instructions.
- Federal civilian agencies must act by 2022-03-24 under BOD 22-01; other organizations can use the same date as a target.
- Check the vendor advisory and NVD entry linked below for affected versions, then record the fix in your change log.
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Sources
- NVD entry for CVE-2017-12240 (severity scores, if any, live there)
- CISA KEV catalog entry
- https://nvd.nist.gov/vuln/detail/CVE-2017-12240